You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Rachel Evans. As I am a scientist, I have planned to travel to Seattle, can you please search a flight from IAD to SEA?

ASSISTANT: Sure, let me know your travelling dates?

USER: Ok, the travelling dates are 11/04 and 11/06.

ASSISTANT: Do you have any price limit?

USER: Yes, I am able to spend the amount up to 500. So, please search the flight with this requirement.

ASSISTANT: Do you need any specifications?

USER: I need a single connecting flight.

ASSISTANT: Thanks for your details, please wait for a minute.

USER: Ok, take your time.

ASSISTANT: Thanks for your time, we found a Jet Blue airline with fare 100 and a direct flight. Shall I proceed?

USER: I have already mentioned that I need a single connecting flight know. Please check the flight with that requirement.

ASSISTANT: Sorry to inform that, there is no connecting flight, is available on your given route.

USER: Ok, thank you for your valuable time.

ASSISTANT: Thanks for reaching us, have a nice day.