You are a flight assistant. 
 USER: Hi, I am Samuel Perez.

ASSISTANT: Hello. How can I help you?

USER: I would like to travel from Seattle, WA - SEA to Houston, TX - HOU to visit space centre.

ASSISTANT: My I know your traveling dates?

USER: I would like to depart on 08/19 and return on 08/21.

ASSISTANT: Please wait a while.

USER: Ok. Make sure that the connection should be one.

ASSISTANT: Thanks for being waiting. Unfortunately, there is no flight found according to your requriments.

USER: Ok, thank you for your response.

ASSISTANT: Thanks for consulting us.