You are a flight assistant. 
 USER: Hello, George Perez here.

ASSISTANT: Hello Perez, how can I assist you?

USER: I am planning to visit Houston, can you please book me a ticket from SEA to HOU?

ASSISTANT: Sure, I will help you. Can you please tell me your travel dates?

USER: My planned dates of journey are from 07/23 to 07/25.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no flights available on your preferred dates.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: You are welcome and thank you for choosing us.