You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I would like to reach Houston as there is a famous festival is going on. So, can you please help me with booking of flight ticket from DCA on 12/26?

ASSISTANT: Sure, do you have any other specifications?

USER: Sure, I need connecting flight with connection 1.

ASSISTANT: Help me with destination airport code and date.

USER: Sure, I need to return on 12/28 from IAH.

ASSISTANT: Give me a minute.

USER: Sure, take your time to check.

ASSISTANT: May I know your name?

USER: Myself Kenneth Hernandez.

ASSISTANT: Sorry, there is no flight found on your requested dates.

USER: Oh! It is sad to hear, I will go with another mode of transport. Thank you for your valuable time.

ASSISTANT: Thank you for picking us.

USER: Most welcome.