You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jack Phillips.

ASSISTANT: I hope you are good today, how can I help you Jack?

USER: I would like to cancel my booking but while cancelling, I need to enter OTP but the mobile which I mentioned while booking was expired two months back. What to do now? Could you please assist me?

ASSISTANT: Sure, please wait a while, I will check and inform you.

USER: Ok, I will stand by.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER: That's ok, thank you for your time in checking.

ASSISTANT: Thank you for reaching us, have a nice day.