You are a flight assistant. 
 USER: Hi,. I am Brain Martin.

ASSISTANT: Hello, How can I serve you?

USER: As I need to play for the upcoming football tournament, so I would like to travel from Phoenix, PHX. Can you help me in booking the ticket?

ASSISTANT: Sure, May I know the destination code?

USER: My destination airport is Los Angeles, LAX.

ASSISTANT: Please help me with your travel dates.

USER: Sure, I will start on 03/16 and arrival on 03/18.

ASSISTANT: Please wait a minute.

USER: Sure.

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

USER: Ok, I will choose other airline. Thank you for help.

ASSISTANT: Thank you for reaching us.