You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Is this flight ticket booking agency?

ASSISTANT: Yes, welcome to our agency.

USER: Thank you.

ASSISTANT: How may I assist you?

USER: Due to sudden change in my trip to another location, I would like to change my reservation to another location, can you please help me out with that?

ASSISTANT: Sure, please provide your name for checking the reservation.

USER: My name is Steven Martinez.

ASSISTANT: Please give me a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting. Unfortunately, there is no reservation is found under your name.

USER: Oh, sad to hear. Anyways, thank you for the information.

ASSISTANT: Welcome, have a great day.