You are a flight assistant. 
 USER: Hi. I am Emily Hill.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I want to attend a live music concert at Los Angeles, can you please book me a ticket with single connection?

ASSISTANT: Sure, May I know your journey airport codes?

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

ASSISTANT: Ok, when do you want to depart and return?

USER: I want to depart on 06/15 and return on 06/17.

ASSISTANT: Ok, please standby.

USER: Ok.

ASSISTANT: Thank you for waiting, There were no flights found with your given details.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for contacting us.