You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Brandon Brown, out of all the students in my college, I was selected as Innovative brain. So, to participate in Innovation Festivals, I am planning to book a ticket to PHL. Will you help me to reserve a ticket with direct flight?

ASSISTANT: Sure, may I Know your price limit?

USER: I can afford up to 5000.

ASSISTANT: Ok, can you please share your other journey code?

USER: My source point is SEA.

ASSISTANT: Please provide your journey dates to proceed further.

USER: 11/21 to 11/23 are my travelling dates.

ASSISTANT: Please stand by.

USER: Ok.

ASSISTANT: Thank you, sorry no flight found with your details.

USER: That's ok. Thanks for your help.

ASSISTANT: Have a nice day.