You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What help do you need from our travel agency?

USER: I need to travel from IAH to IAD, can you help me with that?

ASSISTANT: Sure, I am here to help you with that. Will you please mention your travel dates?

USER: My trip dates are 12/13 and 12/15.

ASSISTANT: Which flight do you prefer either a connecting flight or a direct flight?

USER: I need a connecting flight.

ASSISTANT: Ok, please tell me your full name.

USER: I am William Carter.

ASSISTANT: Sorry to intimate you that, there is no flight available in this route with the dates you have given.

USER: That's ok. Thank you for your help.

ASSISTANT: Most welcome. Thank you for choosing our travel agency.