You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I have a Private moon light DC city walk event at Washington. For this I want to book a ticket from Chicago.

ASSISTANT: Ok.

USER: Could you help me in this ticket booking on 06/17?

ASSISTANT: Sure, we are here to help you.

USER: Ok.

ASSISTANT: Do you need a return ticket also?

USER: Yes.

ASSISTANT: When are you planning to return?

USER: I am planning to return on 06/19.

ASSISTANT: Ok, do you need a stopover in between your journey?

USER: I have a halt in my journey.

ASSISTANT: OK, please share your location points.

USER: My boarding point is at ORD. And  destination code is  IAD.

ASSISTANT: Please give me a moment, I will be back with the best service for you.

USER: Sure.

ASSISTANT: May I know your name please?

USER: I am Sarah Robinson.

ASSISTANT: Sarah, sorry to inform you that there is no flight found with single connection on your route.

USER: Ok, no problem. Thank you for your support.

ASSISTANT: Thank you for contacting us.