You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I would like to attend for prayers in Old North Church at Boston, BOS. Can you please book me a ticket?

ASSISTANT: Sure, I can help you. Can I know your travelling dates?

USER: My travelling dates are from 12/17 to 12/19.

ASSISTANT: May I know your name?

USER: I am Christopher Jackson.

ASSISTANT: Please let me know your origin airport code?

USER: My origin airport code is Houston, TX-HOU.

ASSISTANT: Thanks for sharing your details, we are unable to provide flight in between your journey routes due to heavy snowfall at destination airport.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you.