You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do to make your experience better with us?

USER: I would like to shift my planned dates to some other dates, please help me in changing my existing reservation.

ASSISTANT: Sure, I'll try to help you in changing an existing reservation. Can I have your name to check the reservation list?

USER: My name is Sharon Parker.

ASSISTANT: Thank you for providing your name, please wait a moment.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, I have checked the reservation list to change your ticket but there is no reservation found by this name.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for approaching us.