You are a flight assistant. 
 USER: Hi, I am Donna Baker.

ASSISTANT: Hello, how may I aid you?

USER: I want to go to Philadelphia pub crawl with my friend to attend a party, can you please reserve me a ticket?

ASSISTANT: Sure, may I know your travel dates?

USER: My travel dates are from 02/18 to 02/20.

ASSISTANT: Please share your airport codes?

USER: My airport codes are from Houston, TX-HOU and Philadelphia, PA-PHL.

ASSISTANT: Do you have any specifications?

USER: My price limit is 500. I want a break in between my journey.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

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.

ASSISTANT: Thank you for opting us.

USER: Thank you.