You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Samantha Martin.

ASSISTANT: How may I help you?

USER: I planned to attend for a wedding in PHX, can you please help me to book a flight ticket from HOU?

ASSISTANT: Sure, I am here to help you. When would you like to travel?

USER: I prefer to travel on 07/17 and 07/19.

ASSISTANT: Just a moment.

USER: Sure, take your time.

ASSISTANT: Martin sorry to inform, no flights are available on your prefer dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: you are welcome, thank you very much for contacting us.