You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you now?

USER: I have to change the trip dates because my friend is unable to travel now with us, so we have postponed the trip. Can you please help me to modify the details?

ASSISTANT: Sure, I will help you with that.

USER: Thank you for considering my request.

ASSISTANT: Please share me your good name?

USER: Yes, I am Ashley Gonzalez.

ASSISTANT: Please wait for a moment, while I check for the reservation.

USER: Sure. I will wait.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data.

USER: That's fine, not an problem. Anyway, thank you for your information.

ASSISTANT: Thank you for visiting us.