You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I am Melissa Martinez. I am planning to attend a music festival in Phoenix AZ - PHX, so please help me in booking a flight ticket from TX - HOU.

ASSISTANT: Sure, provide me your journey dates?

USER: I want to fly on 01/09 and return on 01/11.

ASSISTANT: Do you have any specifications?

USER: I need a halt in between my journey.

ASSISTANT: Ok, please wait.

USER: Sure.

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

USER: Not an issue. Thank you.

ASSISTANT: Thank you for reaching us.