You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: There is an emergency case which came to hearing on the dates which I have planned to enjoy in my holidays, so I am unable to travel the trip due to this one. Can you please help me in changing my flight ticket?

ASSISTANT: Sure, may I know your name?

USER: Yes, I am Alexander Evans.

ASSISTANT: Give me a minute.

USER: Sure.

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

USER: Ok, not a problem.

ASSISTANT: Thank you for reaching us.

USER: Anyway's thank you for your information.