You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Myself Raymond Lewis, can you help me with booking ticket from SEA to IAD?

ASSISTANT: Sure, may I know your travelling dates?

USER: Ok, my journey dates should be from Feb 20 to 22.

ASSISTANT: Please share me your specifications.

USER: Ok, I want to departure in the morning time.

ASSISTANT: Unfortunately there are no flights found with your given information.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you approaching us.