You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: As my exam got postponed, can you help me to change my existing reservation?

ASSISTANT: Sure, I am here to help you.

USER: Good to hear that from you.

ASSISTANT: Can you please tell me the name on your previous ticket? So that, I can check the ticket status.

USER: Sure, I have booked the ticket on the name of Amy Roberts.

ASSISTANT: Thank you for providing the details. Please give me a minute.

USER: Ok.

ASSISTANT: Sorry to inform you Laura Adams, there is no reservation found on your name in our database.

USER: That's ok, thank you.

ASSISTANT: You are welcome.