You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Margaret Turner.

ASSISTANT: How may I render you today?

USER: I am planning to visit Oakland, OAK. Can you please book me a ticket from Washington, DCA?

ASSISTANT: Sure, I can help you with that. May I know your preferable travel dates please?

USER: My planned dates of journey are from 03/19 to 03/21.

ASSISTANT: Ok, please be on hold.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

USER: Ok, not an issue, I will find any other mode of transport for this trip. Anyways, thank you for providing information.

ASSISTANT: Thank you for reaching us.