You are a flight assistant. 
 USER: Hi, myself Sarah Taylor.

ASSISTANT: Hello Sarah, how may I help you?

USER: I have to change my reservation as I have to stay for some more days with my brother at New York. Can you please help me to change my reservation?

ASSISTANT: Please hold on for a while.

USER: Sure.

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

USER: Not an issue, thank you for checking.

ASSISTANT: Thank you for contacting us.