You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, Good Morning. How may I guide you?

USER: Due to a medical emergency my trip got postponed to other dates, can you please check if there is any possibility to change my travelling dates?

ASSISTANT: Sure, can I know your name?

USER: My name is Janet Martinez.

ASSISTANT: Sure, hold on for a moment while I check for any existing reservations under your name.

USER: Ok, take your time.

ASSISTANT: I am sorry Janet, there are no reservations with your name.

USER: That's fine.

ASSISTANT: Thank you, have a good day.

USER: Thank you for your information.