You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can 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: Betty Evans here.

ASSISTANT: Give me a minute for checking.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there is a no reservation found under the name.

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

ASSISTANT: Thank you for reaching us.