You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I help you?

USER: I want to change my existing reservation due to my exams got postponed. Can you help me with this?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your name to check the reservation list?

USER: I am Amanda Davis.

ASSISTANT: Please be on hold.

USER: Ok.

ASSISTANT: Sorry, we did not find any reservation in your name.

USER: Ok, not a problem. Thanks for your quick response.

ASSISTANT: Thank you for reaching us.