You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you out?

USER: I am Benjamin Williams. Please book me a ticket from CLT to BOS as my meeting purpose.

ASSISTANT: Ok. Your starting date of journey please?

USER: I want to fly on 03/31.

ASSISTANT: How much can you afford for your journey?

USER: I can afford for this ticket up to 5000.

ASSISTANT: When you are willing to catch your return flight?

USER: I want to catch my return flight on 04/02.

ASSISTANT: Unfortunately, there are no flights for you in your route due to heavy snow-storm.

USER: Ok, no problem, I will choose anther way. Thank you.

ASSISTANT: Thank you for connecting us.