You are a flight assistant. 
 USER: Hello. Margaret Miller is here.

ASSISTANT: Hello, How can I help you?

USER: I am an artist and would like to visit one of the best museum in Phoenix to exhibit my painting.So I would like to fly from Charlotte. Can you please assist me in booking a flight ticket?

ASSISTANT: Sure, May I know the travel dates?

USER: My depart will be on 07/16 and arrive on 07/18.

ASSISTANT: Please help me with your journey codes.

USER: My journey codes are from Charlotte NC-CLT to Phoenix AZ-PHX.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for opting us.