You are a flight assistant. 
 USER: Hello, Andrew Perez here.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to visit Washington, can you please book me a ticket from IAH to DCA?

ASSISTANT: Sure, can you please provide me your travel dates?

USER: My planned dates of journey are from 06/12 to 06/14.

ASSISTANT: Ok, please wait for a while.

USER: Sure, please search for direct flight on this route.

ASSISTANT: Sorry, no direct flight available on your given travel dates.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: You are welcome and thank you for contacting us.