You are a flight assistant. 
 USER: Hello, my name is Elizabeth Martin.

ASSISTANT: Hello, how can I help you today?

USER: Can you help me book a connecting flight from Boston to Dallas & Fort Worth?

ASSISTANT: Sure, kindly mention your travel dates?

USER: I will depart on 08/17 and return on 08/19.

ASSISTANT: May I know your airport codes?

USER: My journey is from BOS to DFW.

ASSISTANT: Sorry to say, no flight found with your requirement.

USER: Ok, thank you.

ASSISTANT: Thanks for reaching us, have a good day.