You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Myself Sarah Davis, I am willing to have a trip in Washington DC - DCA in the month of January. Can you help me to book a flight ticket from Houston, TX - HOU?

ASSISTANT: Ok, help me with your preferable dates.

USER: Ok, my preferable dates to have a trip are 01/13 and 01/15.

ASSISTANT: There is a flight-1029 on Delta airlines, shall I book it?

USER: If it is having a single connecting flight go ahead and book it.

ASSISTANT: Ok, ticket has been done with your preferable dates. Thanks for choosing us.

USER: Thank you for your service.