You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you today?

USER: I am Ashley Harris. Can you help me to book a flight with 1 connection from IAD?

ASSISTANT: Sure, i will help you with that.

USER: My travelling dates are 05/20 and 05/22.

ASSISTANT: Wait for a minute.

USER: I would like to fly to DCA in this week, please search a flight.

ASSISTANT: Sure. I am sorry to say that there is no flight found under details.

USER: Ok, no issues. Thank you for your time.

ASSISTANT: Thank you.