You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am looking for a flight from Houston to meet my friend at Washington. Can you find me a flight?

ASSISTANT: Sure, may I know your planned travelling dates?

USER: I plan to travel on Oct 26 and return on Oct 28.

ASSISTANT: May I know your travelling airport codes?

USER: My source point is HOU and my destination is IAD.

ASSISTANT: For further proceeding, may I know your good name?

USER: My name is Ryan Jackson.

ASSISTANT: If you have any specifications please let me know, I'll check availability of flights according to that?

USER: No, I do not have any other requirement.

ASSISTANT: Sorry Ryan Jackson, there is no flight found as per your travelling details.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.