You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I abet you today?

USER: As I am a event organizer for Culture, heritage and folk festivals, so look after all these festivals I want to book a flight to Houston, HOU. Can you help me to book a ticket from SFO?

ASSISTANT: Sure, could you help me with your journey dates?

USER: Dates are 02/19 and 02/21.

ASSISTANT: Do you have any other preferences?

USER: Price should not cross 1000. I need break in my journey.

ASSISTANT: Okay, may I know your name?

USER: Amanda Hall here.

ASSISTANT: There are no flights available on your preferred dates.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you.