You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to book a ticket from HOU to SEA, can you help me?

ASSISTANT: Sure, I will help you.

USER: My travel dates are 09/04 and 09/06.

ASSISTANT: Please tell your travelling dates? Ok, please wait a minute.

USER: Ok. I want to book a ticket in the name of Donna Collins.

ASSISTANT: Sorry, there are no flights with your planned dates.

USER: No problem.

ASSISTANT: Thank you for contacting us.

USER: Thank you for checking.