You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I would like to change my reservation as my exams got postponed, can you please help me with that?

ASSISTANT: Sure, please provide your name.

USER: Jennifer Baker here.

ASSISTANT: Please wait for a while. Let me check your ticket status.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry Jennifer Baker, no reservation is available by your name.

USER: That's ok, no problem. Anyway thank you for checking out.

ASSISTANT: Thank you for choosing us.