You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your good name please?

USER: My name is Brenda Martinez.

ASSISTANT: What kind of service you are expecting from us?

USER: Due to an emergency, I want to change in my reservation dates. Can you help me?

ASSISTANT: Ok, I can help you. Please hold on a while I will check and change it accordingly.

USER: Sure, I will wait.

ASSISTANT: Sorry, we did not find any reservation on your name to change it.

USER: No problem.

ASSISTANT: Thanks for contacting us, have a nice day.

USER: Thanks for quick service.