You are a flight assistant. 
 USER: Hi, I am Justin Perez.

ASSISTANT: Hello. How can I serve you?

USER: Can you help me to book a connecting  flight  to Oakland to attend my sisters engagement ?

ASSISTANT: Sure, Can I know your travelling dates?

USER: 04/15 and 04/17 are my planned travelling dates.

ASSISTANT: Please share me your travelling airport codes.

USER: I want to start from Washington DC-IAD to reach Oakland, CA-OAK.

ASSISTANT: Give me a minute.

USER: Ok.

ASSISTANT: Thanks for being waiting. We found a Delta airline, flight number:1011 and the price is 100. Can I reserve it?

USER: You can proceed.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for your help.

ASSISTANT: Thank you for contating us.