You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: Myself William Brown.

ASSISTANT: Welcome to flight booking agency William.

USER: Can you please book a flight ticket from SFO to IAD?

ASSISTANT: Sure, I will help you. Can you please provide your itinerary dates of travelling?

USER: Sure, I would like to travel on dates of 04/13 and 04/15.

ASSISTANT: Ok, please wait a moment to check the flights availability.

USER: Sure, take your time to check.

ASSISTANT: Based on your information, I have found flight with 1 connection with the fare of 100. Is it ok for you?

USER: I need connection 0 so please recheck with that.

ASSISTANT: Sorry to inform you that, there are no flights available with connection 0.

USER: It is ok, fine, I will go with another mode of transport this time.

ASSISTANT: Thank you for reaching us, have a great day.

USER: Anyway, thank you.