You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How may I help you?

USER: This is Joseph Phillips.

ASSISTANT: Ok.

USER: I want to book a flight ticket from Boston, MA - BOS to Dallas & Forth Worth, TX - DFW. Can you help me in that?

ASSISTANT: Sure, we are pleased to help you.

USER: Thank you.

ASSISTANT: When you are planning to make your journey?

USER: I would like to live between 04/15 and 04/17.

ASSISTANT: Is there any restrictions in ticket fare?

USER: I need a connecting flight with fare of 200.

ASSISTANT: Ok, please wait a minute.

USER: sure.

ASSISTANT: Thanks for waiting, we are unable to provide flight in between your journey routes due to heavy snowfall.

USER: Ok, it is not an issue. Thank you for your service.

ASSISTANT: Thank you for selecting our service.