You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I need to attend a meeting in Charlotte, can you please make a reservation with normal-cost airlines?

ASSISTANT: Sure, May I know your travelling dates?

USER: My journey start on July 14th, and intend to return back on July 16th.

ASSISTANT: Can I know your airport codes?

USER: My airport source and destination airport codes are, LAX to CLT.

ASSISTANT: Do you have any preferences?

USER: My depart time should be in the afternoon.

ASSISTANT: May I know your name?

USER: This is Patrick Edwards.

ASSISTANT: Thanks for your details, there are no flights found on your data.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you.