You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I guide you?

USER: Please help me to book a flight ticket from Washington to meet my ola friend to start a new business in Houston.

ASSISTANT: Sure. Can I know your travelling dates?

USER: Sure, I intend to start my journey on 01/28 and my return date will be on 01/30.

ASSISTANT: Do you need any break?

USER: Yes, I need a break in between your journey.

ASSISTANT: Please share me your airport codes.

USER: My source airport code is IAD and my destination point is IAH.

ASSISTANT: May I know your name?

USER: I am Robert Green.

ASSISTANT: Is there any other preferences that you would like to add before booking?

USER: No more specifications for this trip.

ASSISTANT: Thank you for providing all necessary details. Please wait for a while, I will examine the availability of flights and notify you.

USER: Sure.

ASSISTANT:  Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: That's ok, I'll choose any alternative to reach my destination. Thank you.

ASSISTANT: Thank you for reaching us.