You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Emily Thompson.

ASSISTANT: What help that you need from our travel agency?

USER: I am having sudden meeting in my office, can you please help me changing my reservation?

ASSISTANT: Sure, I am here to help you in modifying the ticket details. Can you please wait a minute?

USER: Sure, take your time.

ASSISTANT: I am sorry for the trouble which is caused to you, I have not found your ticket reservation on your name to modify.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: You are most welcome.  Thank you for reaching us. Hope you will reach us in future.