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

ASSISTANT: Hello, how may I support you?

USER: Will you please reserve a seat to Las Vegas with a fare of 1000?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: May I know your starting date of journey?

USER: I have to start on 08/24 with out fail to meet my childhood friend.

ASSISTANT: Do you prefer connecting flight?

USER: Yes.

ASSISTANT: When you will catch the return flight?

USER: I will be back on 08/26.

ASSISTANT: Help me with your airport codes.

USER: Oakland, OAK to LAS are the locations.

ASSISTANT: Please, wait.

USER: Ok.

ASSISTANT: Thank you for being patience, there are no flights found on your given requirements.

USER: Ok, Thank you.

ASSISTANT: Thank you for approaching us.