You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I need to change my existing reservation as my exams got postponed, Can you please help me with that?

ASSISTANT: Sure, may I know your name?

USER: Amy Mitchell here.

ASSISTANT: Please give me a moment to check your ticket status.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry Amy Mitchell, no reservation is available by your name?

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.