You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. how may I help you today?

USER: To participate in a scavenger hunt at BOS I need to travel from Washington. So, can you help me book a flight ticket?

ASSISTANT: Sure, we are here to help you. Please share your travelling dates?

USER: I planned to travel on 01/16 and 01/18.

ASSISTANT: Let me know your source point?

USER: My journey is from DCA.

ASSISTANT: May I know your good name please?

USER: I am Edward Brown.

ASSISTANT: Please wait for a while, let me check and revert to you.

USER: Sure.

ASSISTANT: We are very sorry to notify you, unfortunately no flights found on your matching preferences.

USER: Ok, thank you for your response.

ASSISTANT: Thank you for availing us.