You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Joseph Phillips.

ASSISTANT: Phillips, how can I help you today?

USER: I want to book a flight ticket from SEA to HOU. Can you help me?

ASSISTANT: Please tell us your travel dates.

USER: Sure, my depart date is 04/15 and return date is 04/17.

ASSISTANT: Please give me a minute.

USER: Ok, please make sure the fare of the ticket is 200.

ASSISTANT: Sorry Phillips, there is no flight available as per the price you have mentioned.

USER: That's ok, I will plan the trip when the fare becomes less. Thank you for the help.

ASSISTANT: You are welcome.