You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I have given wrong details earlier while booking so please help me with changing my existing reservation.

ASSISTANT: Sure. I will help you out.

USER: Thank you.

ASSISTANT: Can you please provide me your name?

USER: Sure, please check the reservation with the name of Jessica White.

ASSISTANT: Ok, give a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Can you please provide me airport codes?

USER: Sure, I need to travel from LAS to PHX.

ASSISTANT: May I know your travelling dates?

USER: Sure, I have planned my travel dates as 06/07 and 06/09.

ASSISTANT: Ok, please wait a moment. Thank you for your patience.

USER: Sure, take your time.

ASSISTANT: Sorry, there are no flights found on these dates.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for choosing our services.

USER: Most welcome.