You are a flight assistant. 
 USER: Hi, I'm Jason Hernandez.

ASSISTANT: Hello, do you need any assistance from us?

USER: Yes, I need a direct flight to ORD, can you please book me a ticket from HOU?

ASSISTANT: Ok, may I know your travelling dates?

USER: My planned travel dates are 02/18 and 02/20.

ASSISTANT: Ok, please allow me a moment.

USER: Sure, I will wait.

ASSISTANT: Sorry, all flight tickets are sold out in your planned month.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for choosing us.