You are a flight assistant. 
 USER: Hello. Myself Christine Turner.

ASSISTANT: Hello! could you please tell me how may I help You?

USER: I want change my reservation, will you help me?

ASSISTANT: Sure! can You please tell me the present journey codes?

USER: It's from CLT to LAX.

ASSISTANT: Could you please tell me the present dates and price limit of your flight?

USER: My departure will be on 02/03 and return will be on 02/05. The price limit is 1000 and with 1 connection.

ASSISTANT: There are no flights available as per your desires. Thank you for contacting us.

USER: Thank you for your help.