You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Sarah Carter.

ASSISTANT: Sarah Carter, by what way may I aid you?

USER: Will you please book a flight ticket on 11/20?

ASSISTANT: We are here to help you.

USER: Thank you.

ASSISTANT: Your boarding and landing locations please?

USER: DCA, Washington is my source. Philadelphia, PHL is destination to participate in hiking with my friends.

ASSISTANT: Need any connections for your journey?

USER: Connection limit is 1.

ASSISTANT: On which date you have to return?

USER: I would like to arrive on 11/22.

ASSISTANT: Give a minute, I will check and let you know the flight availability.

USER: Sure.

ASSISTANT: UA airline of price 200 with 1 connection in 1007 flight is available with your data. Shall I made it to confirm?

USER: You can confirm my ticket.

ASSISTANT: Making to reserve has been completed.

USER: Thank you.

ASSISTANT: Thank you for your time with us, have a safe journey.