You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Linda Baker here.

ASSISTANT: Linda, how may I aid you?

USER: I have to change my reservation as my trip got postponed, can you please do that for me?

ASSISTANT: Sure, please give me a moment to check your ticket status.

USER: Sure, I will wait for your response.

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

USER: Not an issue, anyway thank you for checking.

ASSISTANT: Thank you for contacting us.