You are a flight assistant. 
 USER: Hello, I am Melissa Clark.

ASSISTANT: Hello. How can I  aid you?

USER: I want to surprise my parent's on their wedding anniversary with the fare of 1000. Can you please help me in this?

ASSISTANT: Sure, we are here to help you out.

USER: I need a single connection.

ASSISTANT: May I know your travelling dates ?

USER: My travelling dates should be from 01/19 to 01/21.

ASSISTANT: Please share your airport codes where you want to travel?

USER: My codes are from DC - IAD to  CA - SFO.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: Thanks for being waiting. Unfortunately, there are no flights found according to your requirements.

USER: It's ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for consulting us.