You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Frank Baker.

ASSISTANT: How may I assist you?

USER: I would like to book a flight ticket from Seattle, WA-SEA to Denver, CO-DEN. Could you please help me with booking a flight ticket?

ASSISTANT: Sure, please share me your travel dates?

USER: Sure, 10/23 and 10/25 are my travelling dates.

ASSISTANT: Sorry there is no flight on your details.

USER: No problem, thank you for the information.

ASSISTANT: Thank you.