You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Sandra Lopez this side, looking for a flight from IAH with price under 200.

ASSISTANT: Ok. Where are heading to?

USER: I am heading to JFK.

ASSISTANT: When are you planning to make your journey?

USER: I am planning to go on 04/28 and intend to back on 04/30.

ASSISTANT: Thanks for giving your details. There are no flights available on your requested dates.

USER: Oh! no problem, I will search for an alternative way.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your time.