You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Shirley Wright.

ASSISTANT: How can I help you today?

USER: I am looking to book a flight ticket from Dallas to reach my destination. Can you help me for booking a flight ticket?

ASSISTANT: sure, I am will help you in booking. Will you please share your travel dates?

USER: I would like to start my journey on 08/31 and my return will be on 09/02.

ASSISTANT: Ok, may I know your airport codes?

USER: My source airport code is DCA and destination airport code is DFW.

ASSISTANT: Please give me a moment.

USER: Sure, I will wait.

ASSISTANT: Sorry, no flights are available on your route.

USER: No problem. I will reach my destination through another way, any way thank you for your information.

ASSISTANT: Welcome, thank you for reaching us.

USER: Welcome.