You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: I am Jonathan Campbell, I am looking for a connecting flight from Oakland to visit my friend on his marriage. Can you help me to book a flight under fare of 1000?

ASSISTANT: Sure, I can help you. May I know your travelling dates?

USER: I will fly on 03/13 and return on 03/15.

ASSISTANT: Please share me your travelling airport codes.

USER: My source point is CA-OAK and destination is TX-IAH.

ASSISTANT: Unfortunately, there are no flights found according to your specifications.

USER: Ok, thank you for the details.

ASSISTANT: Thank you for choosing us.