Oh, my god! It's six o'clock now. My flight is at 7:30.I can't catch it.
哦，天哪！现在已经六点钟了。我的航班是7:30起飞，我赶不上了。
Take it easy! I'm sure you can catch the plane.
放心！我肯定你会赶上航班的。

重点讲解:

Don't worry. You'll be there in time for your flight.
Take it easy! I'm sure you can catch the plane.

英语口语中表示“赶上航班”常用catch the plane这个短语，用be in time for the flight语法上虽然没有错误，但是会显得过于书面，非常生硬。Take it easy!这个短句在口语中也十分常用，意思是“别紧张；别着急”，常用在时间紧迫的情况下安慰他人。