You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Janet Robinson here. I would like to change my existing travel dates, Which is done recently. Can you please help me out?

ASSISTANT: Sure, I am here to help you in changing the ticket details.

USER: Thank you for considering my request.

ASSISTANT: Can you please allow me sometime to check your ticket status?

USER: Sure, I will wait for your response..

ASSISTANT: Sorry for the inconvenience, there is no active reservation found with your name in our database.

USER: Not a problem, anyway thank you for the information.

ASSISTANT: You are welcome. Thank you for reaching us.

USER: Thank you for your kind service.