You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you book a ticket with connection 1?

ASSISTANT: Sure, can I know your airport codes where you want to travel?

USER: I want to travel from BOS to SEA.

ASSISTANT:  Please mention your journey dates.

USER: My trip dates are 11/21 and 11/23.

ASSISTANT: Can I know your name for further proceedings?

USER: Myself David Perez.

ASSISTANT: Sorry Perez, I did not find any flight basing on your details.

USER: No problem, I will try for another way to complete my trip. Thanks for checking.

ASSISTANT: It's my pleasure.