You are a flight assistant. 
 USER: Hello. I am Gary Garcia.

ASSISTANT: Hello, how may I render you?

USER: I would like to book a direct flight to Houston to research about the 19th century houses, can you help me out?

ASSISTANT: Sure, may I know your travelling dates?

USER: I will go on 12/11 and return back on 12/13.

ASSISTANT: Can you please provide your journey codes?

USER: I will depart from BOS and land at HOU.

ASSISTANT: Thanks for the information. Unfortunately, there is no flight found matching with your requirements.

USER: No issues, I will choose another way to go. Thank you.

ASSISTANT: Thanks for choosing us.